Miller Electric MPi 220P, Owner'S Manual

Page: 30 / 80

OM-253 918 Page 24
5-3. Preparing Unit For TIG Welding
Ref. 956142881_7-B
1 Positive Weld Output Terminal
2 Gun Trigger Receptacle
3 Negative Weld Output
Terminal
4 Hot Start Adjustment Knob
5 Amperage Adjustment Control
Knob
6 Digital Meter Display
7 Process Selector Switch
8 Welding Amperage
9 Welding Voltage
10 TIG Welding Symbol
11 Set Amperage
12 Hot Start Adjustment Switch
Prepare unit for TIG welding as fol-
lows:
Connect electrode holder to negat-
ive weld output receptacle.
Connect work clamp to positive
weld output terminal.
Turn power on. Allow time for unit
complete its start up cycle.
Press and release Process select-
or switch to select TIG welding.
Corresponding symbol is dis-
played. Use amperage adjustment
control knob to set desired amper-
age value. Rotate knob clockwise
to increase amperage (min - max).
Slope Down Setting
To change Slope Down setting, pro-
ceed as follows:
Use the Amperage Adjustment
control knob or switch to reduce
amperage over a set period of time
(0 - 20 seconds) at the end of the
weld. The default setting is 2
seconds.
Application
Slope Down should be used while
TIG welding materials that are
crack sensitive, and/or the operator
wants to eliminate the crater at the
end of the weld.
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